<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>选择</title>
    <style>
        /* 
        必须结合content来使用
        */
        p::before {
            content: '我是开头';
            color: #71d151;
        }

        p::after {
            content: '我是结尾';
            color: #71d151;
        }

        /* 
        通过 before 和 after 添加的内容 是无法被选中的！
        */
    </style>
</head>

<body>

    <p>
        We take an opinionated view of the Spring platform and third-party libraries so you can get started with minimum
        fuss. Most Spring Boot applications need minimal Spring configuration.
    </p>
</body>

</html>